English

hackday

From hack + day.

A compound of hack + day

Proto-Indo-European *keg-

Proto-Germanic *hakkōną ‘to chop’

Proto-West Germanic *hakkōn ‘to hack, chop’

Old English *haccian ‘to hack’

Middle English hacken

English hack

Proto-Germanic *dagaz

Proto-West Germanic *dag

Old English dæġ ‘day’

Middle English day ‘a day’

English day

Today it means

noun The day when a hackathon is held.

Language periods are conventional ranges, not dates for this word.